.a {
  color: white;
}
.a:hover {
  color: white;
  text-decoration: unset;
}
body {
  background-color: #F2F4F7;
}
header {
  background-color: #373D41;
  padding: 0 40px;
  color: white;
  height: 60px;
  line-height: 60px;
}
header a {
  color: white;
}
header a:hover {
  color: white;
  text-decoration: unset;
}
header h4 {
  font-weight: bolder;
  display: inline-block;
}
header #search_name {
  position: relative;
  border: white 1px solid;
  border-radius: 15px;
  height: 30px;
  line-height: 30px;
  margin-top: 15px;
}
header #search_name input {
  height: 30px;
  margin-left: 10px;
  background-color: unset;
  outline: none;
  width: 85%;
  border: 0;
}
header #search_name .icon-search2 {
  position: absolute;
  top: 0px;
  right: 10px;
}
header .col-md-3 {
  cursor: pointer;
  position: relative;
  height: 60px;
}
header .col-md-3:hover {
  background-color: #32373B;
}
header .col-md-3:hover #matter_div {
  display: block;
  height: 200px;
  border: gray 1px solid;
}
header .col-md-3:hover #matter_div div {
  height: 60px;
  opacity: 1;
}
header .col-md-3 #matter_div {
  display: none;
  position: absolute;
  top: 60px;
  left: -200px;
  width: 400px;
  height: 0px;
  color: black;
  font-size: 12px;
  z-index: 99;
  background-color: white;
  border-radius: 5px;
  transition: all 0.2s linear;
}
header .col-md-3 #matter_div .matter_num {
  color: red;
}
header .col-md-3 #matter_div div {
  padding: 0 10px;
  height: -1;
  opacity: 0;
  transition: all 1s linear;
}
header .col-md-3 #matter_div > div:first-child {
  width: 100%;
  color: #999999;
  background-color: #f2f2f2;
}
header #user_div {
  cursor: pointer;
  position: relative;
  height: 60px;
}
header #user_div #pull_down {
  position: absolute;
  color: #B5B5B5;
  top: 60px;
  left: 0px;
  display: none;
  width: 120px;
  height: 180px;
  padding-top: 10px;
  background-color: white;
  box-shadow: 0 0 5px #949494;
  border-radius: 5px;
  text-align: center;
  z-index: 99;
}
header #user_div #pull_down div {
  margin: 0;
  padding: 10px;
  height: 40px;
  line-height: 20px;
}
header #user_div #pull_down div:hover {
  background-color: #f2f2f2;
}
header #user_div #pull_down a {
  color: black;
}
header #user_div:hover #pull_down {
  display: block;
}
#nav_left {
  margin-top: 10px;
  height: 100%;
  border-right: 8px solid white;
}
#nav_left ul {
  margin: 0 0 0 5px;
  padding: 0;
  text-align: center;
}
#nav_left ul .nav_color {
  background-color: #acb9cc;
}
#nav_left ul .nav_color a {
  color: #0079FE;
}
#nav_left ul li {
  list-style: none;
  height: 80px;
  line-height: 80px;
  background-color: #333744;
  margin-bottom: 1px;
}
#nav_left ul li:first-child {
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
}
#nav_left ul li:last-child {
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}
#nav_left ul li:hover {
  background-color: #8b99ec;
}
#nav_left ul li:hover a {
  color: #0079FE;
}
#nav_left ul li a {
  color: white;
  font-size: 20px;
  font-weight: bolder;
}
#nav_left ul li a:hover {
  text-decoration: none;
}
.content_nav {
  height: 60px;
  line-height: 60px;
  background-color: white;
  color: #999999;
  padding: 0 20px;
  margin-bottom: 20px;
}
.content_nav a {
  color: #999999;
}
.content_nav a:hover {
  color: black;
  text-decoration: unset;
}
.content_nav span {
  margin-right: 20px;
}
